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pipe length for basement bathroom fan

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  • pipe length for basement bathroom fan

    I have an unused dryer outlet opening. Now I need a basement bathroom fan. It will be nice to use that existing opening. But it is about 25ft away. Piping from bathroom to that opening is easy. Do you think it is a good idea to have a 25ft long passage for the dump air flowing out the basement? insulate the pipe for condensation concern?
    thanks

  • #2
    Re: pipe length for basement bathroom fan

    Is this a full bath with tub/shower, steam room or whirlpool tub? If so, you should use solid pipe to avoid the bellies you would get when using flex duct, and pitch it down gently toward your outlet. If it is a half bath - toilet and sink you may use flex duct with no worries. I can't find anything concerning maximum lengths for a horizontal run for a bath exhaust fan although you should take your square footage, say 10 X 10=100 square feet and multiply by 1.07 for a total of 107 square feet and buy the next larger size in cfm capacity. Insulate the pipe if you are exhausting moisture laden air from the bathroom to the outlet.

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    • #3
      Re: pipe length for basement bathroom fan

      Bath venting should be hard pipe where easily installed. It should be sealed with tape and insulated where needed. Maximum length is specified by the manufacturer for each model made.
      ~~

      ... it was plumbed by Ray Charles and his helper Stevie Wonder

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      • #4
        Re: pipe length for basement bathroom fan

        Originally posted by thisnewowner View Post
        I have an unused dryer outlet opening. Now I need a basement bathroom fan. It will be nice to use that existing opening. But it is about 25ft away. Piping from bathroom to that opening is easy. Do you think it is a good idea to have a 25ft long passage for the dump air flowing out the basement? insulate the pipe for condensation concern?
        thanks
        I think you should use steel pipe which are better option for you.
        Scaffold for Sale

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